Mortar composition

A method for the acoustic damping in a ship, an offshore installation, a vehicle and/or in a building, said method comprising the steps of:

• producing a structure comprising:
• a shaped body comprising a mortar composition after hardening with water, the shaped body having a loss factor tan δ according to standard ISO 6721 at 0° C. and 300 Hz of at least 0.05, wherein
• the hardened mortar composition of the shaped body is configured for acoustic damping of the ship, the offshore installation, the vehicle and/or the building, and
• the mortar composition comprises:
• 3-10 wt % of a hydraulic binder,
• 30-80 wt % of aggregates,
• 25-35 wt % of a polymer, and
• 2-6 wt % of a porous filler, wherein
• the porous filler comprises volcanic rock, and
• the porous filler has a porosity of at least 25 vol % and a grain size of the porous filler is 4 mm or less;
• and
• a support element and cover element being attached to the shaped body;
• wherein
• the shaped body comprising the hardened mortar composition is formed by mixing the mortar composition with water, applying the mixture on a support structure and covering the mixture with a covering layer, and wherein the mortar composition is applied on a floor, on a wall, and/or on a ceiling.